| Advanced Unmanned Search System (AUSS) Testbed. FY 1987 Development Testing |
NOV 92 |
91 pages |
| Authors:
J. Walton; NAVAL COMMAND CONTROL AND OCEAN SURVEILLANCE CENTER RDT AND E DIV SAN DIEGO CA
|
 | In FY 1987, tests were conducted with the Advanced Unmanned Search System (AUSS) vehicle to define and solve technical and performance-risk areas. This report describes these FY 1987 AUSS sea tests, including the modifications and improvements, made to collect data needed to support the next-generation system design. This report covers the most critical risk areas that were encountered in the FY 1987 sea tests. The areas covered included acoustic link, ... |
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| Deep-Ocean Search and Inspection: Advanced Unmanned Search System (AUSS) Concept of Operation |
NOV 92 |
87 pages |
| Authors:
R. W. Uhrich; S. J. Watson; NAVAL COMMAND CONTROL AND OCEAN SURVEILLANCE CENTER RDT AND E DIV SAN DIEGO CA
|
| This report explains search tactics and many of the innovative ideas and technologies that are used to perform the AUSS deep search and inspection. These include the acoustic link, which makes untethered communications possible; the Doppler sonar, which enables it to track its position and navigate without interfering with the acoustic link; high-quality sonars and optical sensors; supervisory control and sophisticated computers and software.... Deep ocean search, Navigation, Acoustic links, ... |
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| A Current Assessment of Single Site Locating Technology |
NOV 1992 |
11 pages |
| Authors:
Robert B. Rose; NAVAL COMMAND CONTROL AND OCEAN SURVEILLANCE CENTER RDT AND E DIV SAN DIEGO CA
|
| This paper describes the observed performance of a HF Single Site Locator (SSL) which employs current interferometer technology. 142 locations were obtained from non-cooperative targets over a five day period in April 1989. Locations were determined from fast, high resolution azimuth and elevation angle of arrival measurements and a knowledge of the ionospheric reflecting medium. Exact emitter locations were determined post facto with ground truth data from the field units. ... |
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| Radiolocation of a Satellite-Borne LOVHF Beacon |
NOV 1992 |
9 pages |
| Authors:
Robert B. Rose; NAVAL COMMAND CONTROL AND OCEAN SURVEILLANCE CENTER RDT AND E DIV SAN DIEGO CA
|
| A year long experimental program was conducted to measure refractive bending, or how much the signal deviates from true line of sight, at low VHF frequencies (29.5 MHz), and to determine whether this deviation or error could be predicted using large scale ionospheric models such as the Ionospheric Conductivity and Electron Density (ICED) program. An experiment to directly measure the angle of arrival of a 29.5 MHz signal from an ... |
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| Diamond Based Microelectronics |
NOV 1992 |
4 pages |
| Authors:
J. R. Zeidler; C. A. Hewett; NAVAL COMMAND CONTROL AND OCEAN SURVEILLANCE CENTER RDT AND E DIV SAN DIEGO CA
|
| The need for electronic devices which will reliable operate in the temperature range from 400 to 600 deg C has made it essential to look beyond conventional electronic materials such as silicon or gallium arsenide. Devices based on these materials are presently able to meet a limited number of elevated temperature demands, but only with the added cost and complexity of an environmental cooling system. Sensors and control devices mounted ... |
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| Assessing Ecological Risk Using Exposure Response Models. The Allen Harbor Case Study |
NOV 1992 |
3 pages |
| Authors:
W. R. Munns Jr.; C. Mueller; R. K. Johnston; W. G. Nelson; NAVAL COMMAND CONTROL AND OCEAN SURVEILLANCE CENTER RDT AND E DIV SAN DIEGO CA
|
| Exposure-response models were developed as the final phase in a multiyear case study to assess risks to marine ecosystems in Allen Harbor, RI associated with land-based hazardous waste sites. These models were developed for acute and chronic responses of marine species exposed to sediments, sediment extracts, and ground water associated with a landfill adjacent to Allen Harbor. Serial dilutions of these media were characterized chemically and presented in the laboratory ... |
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| Use of Exposure-Response Bioassays on Arabica Punctulata for the Determination of Ecological Risk |
NOV 1992 |
3 pages |
| Authors:
C. Mueller; B. Rogers; P. Comeleo; S. Jayaraman; Jr Munns W.; NAVAL COMMAND CONTROL AND OCEAN SURVEILLANCE CENTER RDT AND E DIV SAN DIEGO CA
|
| Two sea urchin exposure-response bioassays were conducted to develop a marine ecological risk assessment (ERA) model and to determine the effects of hazardous waste disposal at the Naval Construction Battalion Center (NCBC), Davisville,RI on the adjacent Allen Harbor and Narragansett Bay. Arbacia gametes and embryos were exposed for 20 min and 48 hr to serial dilutions of landfill- associated sediment extract and seep water samples to evaluate the effects of ... |
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| Demonstration of a Remotely Operated Vehicle System for Marine Security |
19 OCT 1992 |
9 pages |
| Authors:
Barbara E. Fletcher; NAVAL COMMAND CONTROL AND OCEAN SURVEILLANCE CENTER RDT AND E DIV SAN DIEGO CA
|
| Remotely operated vehicles (ROVs) can play a variety of roles in the protection of marine assets against waterborne threats. The Underwater Security Vehicle program, sponsored by the Defense Nuclear Agency, was developed as an assessment tool to complement other security systems. The demonstration system, a Benthos Super SeaROVER vehicle equipped with a Smiths lb-Scan 600 sonar, has been successfully used to acquire, track, and intercept designated diver targets. Current efforts ... |
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| Fractal Image Compression Using Iterated Transforms: Applications to DTED |
11 OCT 1992 |
10 pages |
| Authors:
E. W. Jacobs; R. D. Boss; NAVAL COMMAND CONTROL AND OCEAN SURVEILLANCE CENTER RDT AND E DIV SAN DIEGO CA
|
| A review of iterated transformation image compression is presented. Generalization of simple iterated function system fractal generating algorithms to an automated iterated transformation algorithm used to compress greyscale images is reviewed. Compressed images from the Digital Terrain Elevation Database are presented, and compared with encodings using adaptive discrete cosine transformations, and mean residual vector quantization image compression techniques.... Data compression, Fractals. |
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| High-Performance Visualization Applied to Computational Electromagnetics: Method-of-Moments on a Silicon Graphics Workstation |
OCT 92 |
56 pages |
| Authors:
L. C. Russell; J. W. Rockway; NAVAL COMMAND CONTROL AND OCEAN SURVEILLANCE CENTER RDT AND E DIV SAN DIEGO CA
|
| This investigation applied advanced visualization techniques to an existing computational electromagnetic code. The goal was to demonstrate that high-performance visualization can improve the utility of computational techniques used in ship electromagnetic designs. The code used was the Numerical Electromagnetics Code Method of Moments (NEC-MoM). The visualization platform was a Silicon Graphics 4D workstation. Two codes were developed to do pre- and post-processing visualization on NEC-MoM. This report lists several benefits ... |
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| Brownian Reber Search Theory for the Advanced Unmanned Search System (AUSS) |
OCT 92 |
40 pages |
| Authors:
D. Grace; NAVAL COMMAND CONTROL AND OCEAN SURVEILLANCE CENTER RDT AND E DIV SAN DIEGO CA
|
| This report develops a model to quantify the performance of a search system in terms of the parameters which most directly affect that performance. This quantification necessitates a number of important simplifications, which are explicitly stated. A theory based on these simplifications is developed, and a parameterized summary of the performance of the AUSS is provided which may be used in its engineering and operation.... Search theory, Brownian theory, Reber ... |
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| Ruggedizing: What Does it Mean! |
OCT 1992 |
15 pages |
| Authors:
R. E. Miller; NAVAL COMMAND CONTROL AND OCEAN SURVEILLANCE CENTER RDT AND E DIV SAN DIEGO CA
|
| "Ruggedized equipment" has been the term used during the past few years to describe equipment not designed to full Military Specifications (MIL- SPECs), but advertised to function under adverse conditions (the military environment). This booklet will attempt to clear up the confusion as to what the term ruggedized equipment means, what ruggedized equipment is, and how much testing is required. But first, lets become acquainted with the Navy's way of ... |
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| Terrain Modelling Using the Split-Step Parabolic Equation Method |
OCT 1992 |
6 pages |
| Authors:
Amalia E. Barrios; NAVAL COMMAND CONTROL AND OCEAN SURVEILLANCE CENTER RDT AND E DIV SAN DIEGO CA
|
| There are currently several software programs that model radiowave propagation over irregular terrain. These models use a combination of spherical earth diffraction, multiple knife-edge diffraction, wedge-diffraction, and geometrical optics to arrive at a solution for the field for a given transmitter/receiver geometry and a specified terrain path. More recently, parabolic equation (PE) methods have been applied to model propagation over terrain, such as that developed by Levy.... Propagation assessment, Command ... |
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| Neural Adaptive Sensory Processing for Undersea Sonar |
OCT 1992 |
11 pages |
| Authors:
Steven L. Speidel; NAVAL COMMAND CONTROL AND OCEAN SURVEILLANCE CENTER RDT AND E DIV SAN DIEGO CA
|
| Neural adaptive beamformers (NABFs) utilize neural paradigms to accomplish desired adaptions that are associated with sensory-field-responsive partitioning and selection processes. Kohonen-type organization and Hopfield- type optimization have been formulated as NABF mechanisms and have been applied to test data. Formulations and results are included NABF's are also used in conjunction with a learning network for interpretation of weight sets as population codings of direction. An example is included. Finally, desirable ... |
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| Hybrid Ray Optics and Parabolic Equation Methods for Radar Propagation Modeling |
OCT 1992 |
6 pages |
| Authors:
Herbert V. Hitney; NAVAL COMMAND CONTROL AND OCEAN SURVEILLANCE CENTER RDT AND E DIV SAN DIEGO CA
|
| The use of parabolic equation (PE) methods has become very popular in recent years for modeling radar propagation effects in the lower atmosphere, especially for in which the vertical refractive index profile changes along the propagation path. The PE method normally used is the split-step method described by Tappert, which has been implemented by Dockery, Craig and Levy, and others. An advantage of the PE method is its ability to ... |
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| Asymmetric Microstrip Lines on Anisotropic Substrates with Material Axes Inclined in the Transverse Plane |
OCT 1992 |
5 pages |
| Authors:
T. Q. Ho; B. Beker; NAVAL COMMAND CONTROL AND OCEAN SURVEILLANCE CENTER RDT AND E DIV SAN DIEGO CA
|
| The frequency-dependent characteristics of shielded asymmetric microstrip lines on uniaxial and biaxial substrates are presented in this memorandum. The permittivity tensor of the supporting medium is assumed to have off-diagonal elements due to the misalignment between the waveguide coordinate system and that of the material. New data for the dispersive properties of the asymmetric structure are provided for frequencies up to 40 GHz.... Frequency- dependent characteristics, Biaxial substrates, Asymmetric microstrip. ... |
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| A Broad-Band Coplanar Waveguide to Slot Line Transition |
OCT 1992 |
4 pages |
| Authors:
Thinh Q. Ho; Stephen M. Hart; NAVAL COMMAND CONTROL AND OCEAN SURVEILLANCE CENTER RDT AND E DIV SAN DIEGO CA
|
| A novel approach for designing a broad-band coplanar waveguide (CPW) to slotline transition is presented. A slotline hollow patch creates open circuit conditions on one arm of the CPW and resonates the transition so that maximum power transfer may occur. Excellent performance is observed over a 5:1 bandwidth.... Broad-band coplanar waveguide (CPW), Slotline, Bandwidth. |
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| An Integrated Navigation Approach for Ship Track Control |
OCT 1992 |
13 pages |
| Authors:
Martin E. Leblang; Jules Kriegsman; NAVAL COMMAND CONTROL AND OCEAN SURVEILLANCE CENTER RDT AND E DIV SAN DIEGO CA
|
| This paper describes a ship steering system that provides a means to accurately steer a ship along a prescribed track such as a rhumb line, for indefinite distances. This is accomplished by applying frequent heading corrections via a trackkeeping interface to the ship's autopilot, based on best present ship position data (BPP) and the prescribed track. Best present position is obtained from an integrated navigation positioning system. The navigation positioning ... |
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| Bonded Silicon-on-Sapphire Wafers and Devices |
15 SEP 1992 |
4 pages |
| Authors:
G. P. Imthurn; G. A. Garcia; H. W. Walker; L. Forbes; NAVAL COMMAND CONTROL AND OCEAN SURVEILLANCE CENTER RDT AND E DIV SAN DIEGO CA
|
| Silicon-on-sapphire (SOS) has been prepared by direct wafer bonding. The silicon layer was thinned to about 10 micrometers mechanical grinding and chemical etching. P-N junction diodes were fabricated in the bonded SOS and compared with epitaxially grown SOS. The reverse bias leakage current was almost 15 x less in the bonded SOS. A generation lifetime of 10 microseconds can be estimated from the junction leakage. The effects of processing temperatures ... |
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| Applications Development on the Intel iWarp System |
SEP 92 |
50 pages |
| Authors:
J. Z. Lou; NAVAL COMMAND CONTROL AND OCEAN SURVEILLANCE CENTER RDT AND E DIV SAN DIEGO CA
|
| This report discusses the development of parallel programming tools, mathematical tools, and signal and image processing applications on the Intel IWarp system. The report begins with a discussion on parallel processing for signal and image processing. Some issues related to parallel programming on the iWarp system are discussed. The report presents algorithms and implementations of parallel programming tools on the iWarp system. The report discusses mapping applications to the iWarp ... |
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| VLF Source Localization with a Freely Drifting Acoustic Sensor Array |
SEP 1992 |
157 pages |
| Authors:
G. C. Chen; NAVAL COMMAND CONTROL AND OCEAN SURVEILLANCE CENTER RDT AND E DIV SAN DIEGO CA
|
| The objective of this study is to demonstrate the source localization and tracking capability of the freely drifting Swallow float volumetric array with the matched-field processing (MFP) technique using data collected during the 1989 Swallow float experiment conducted in the Northeast Pacific. A set of nine freely drifting, infrasonic sensors, capable of recording ocean ambient noise in the 1- to 25-Hz range, was deployed to span the water column of ... |
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| Boron Carbide Aluminum Cermets for External Pressure Housing Applications |
SEP 92 |
168 pages |
| Authors:
J. D. Stachiw; A. Pyzik; D. Carroll; A. Prunier; T. Allen; NAVAL COMMAND CONTROL AND OCEAN SURVEILLANCE CENTER RDT AND E DIV SAN DIEGO CA
|
| B4C/Al ceramic composites have been found to be excellent candidates for pressure housing applications for use in deep submergence underwater vehicles. These materials have the compressive strengths of a ceramic material but a lower weight/displacement ratio and can be produced in near-net shape. A methodology has been developed in The Dow Chemical Company to form large parts of this material. Nine B4C/Al cylinders with 6-inch diameters and lengths of up ... |
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| Advanced Unmanned Search System (AUSS) Surface Navigation, Underwater Tracking, and Transponder Network Calibration |
SEP 92 |
114 pages |
| Authors:
P. D. Osborne; C. C. Geurin; NAVAL COMMAND CONTROL AND OCEAN SURVEILLANCE CENTER RDT AND E DIV SAN DIEGO CA
|
| This report describes the surface navigation and underwater tracking system capabilities used in support of the Advanced Unmanned Search System (AUSS) development program. Various surface navigation and underwater tracking modes and the hardware involved are discussed. Navigation and tracking performance objectives are stated, and where available, at-sea test data results are presented to support claims. The hardware and software necessary for the deployment and calibration of a typical underwater tracking ... |
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| Automatic Hovering Algorithms for the Advanced Unmanned Search System (AUSS) |
SEP 92 |
27 pages |
| Authors:
J. L. Held; NAVAL COMMAND CONTROL AND OCEAN SURVEILLANCE CENTER RDT AND E DIV SAN DIEGO CA
|
| Certain maneuvering functions of the Advanced Unmanned Search System (AUSS) vehicle must be performed without human intervention. This report covers the design and performance of algorithms for the hovering functions of the AUSS vehicle. The performance of algorithms for hover heading, hover pitch, hover depth, and hover altitude was simulated on a computer and measured by at-sea testing. This report documents that performance.... Deep ocean search, Hover depth, AUSS, Hovering ... |
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| The Fast Area Search System (FASS). A Feasibility Study |
SEP 92 |
201 pages |
| Authors:
D. L. Endicott Jr.; G. R. Kuhl; NAVAL COMMAND CONTROL AND OCEAN SURVEILLANCE CENTER RDT AND E DIV SAN DIEGO CA
|
| This report presents the results of the first phase of the FASS project, during FY 84. The first phase of the FASS project comprised a multifaceted feasibility study that was the initial step of a multiyear effort intended to result in the development of a 'next generation' rapid search system.... AUSS, Multiple vehicle, Single vehicle, Target size, Dual vehicle. |
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| Technical Manual, Redesigned ARC-2A Automatic Radon Counter |
SEP 92 |
59 pages |
| Authors:
Kathleen M. Littfin; NAVAL COMMAND CONTROL AND OCEAN SURVEILLANCE CENTER RDT AND E DIV SAN DIEGO CA
|
| The ARC-2A Automatic Radon Counter (Serial No. 87003) was manufactured in 1987 by Ocean Communication Systems, Inc, Panama City, Florida. It was designed as a stand-alone system, but was consistently plagued with problems. The manufacturer could not repair the machine. The ARC-2A was completely redesigned at NCCOSC RDT and E Division. It is now interfaced to a computer. A new manual was written with updated information and user instructions. The ... |
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| Advanced Unmanned Search System (AUSS). Battery Monitor/Charging Systems |
SEP 92 |
57 pages |
| Authors:
M. E. Rasmussen; NAVAL COMMAND CONTROL AND OCEAN SURVEILLANCE CENTER RDT AND E DIV SAN DIEGO CA
|
| Described in this report is the Advanced Unmanned Search System (AUSS) main battery charge/discharge monitor system and its components. The emergency processor battery charger is also discussed. Charging/discharging instructions for the battery monitor, a list of AUSS schematic drawings of the battery monitor and its components, and the computer programs for battery charges and discharges are included.... Main battery, Emergency processor battery, Cell monitor boards, Battery Charge/Discharge Monitor System (BCDMS). ... |
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| Broadband Conventional Beamforming Incorporating Adaptive Equalization |
SEP 92 |
45 pages |
| Authors:
Richard C. North; NAVAL COMMAND CONTROL AND OCEAN SURVEILLANCE CENTER RDT AND E DIV SAN DIEGO CA
|
| This report discusses methods which attempt to coherently recombine the spatially and temporally different multipaths with the direct path to enhance array gain. These methods are based on utilizing a broadband conventional beamformer incorporating adaptive equalization to recombine multipath information. Preliminary results are compared with two well-known narrow-band, purely spatial processing techniques: the Bartlett beamformer and the minimum variance distortionless response beamformer. While preliminary results are promising, several important research ... |
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| Oceanic in Situ Fraunhofer-Line Characteristics (Fraunhofer-Line Underwater eXperiment: FLUX) |
SEP 92 |
22 pages |
| Authors:
M. G. Lovern; M. W. Roberts; S. A. Miller; G. T. Kaye; NAVAL COMMAND CONTROL AND OCEAN SURVEILLANCE CENTER RDT AND E DIV SAN DIEGO CA
|
| Interest in making use of the existence of Fraunhofer lines to reduce solar background noise for the Satellite Laser Communications (SLC) program prompted the requirement for making underwater in situ characterizations of five Fraunhofer lines in the blue-green spectrum. Recent papers that discuss and attempt to explain frequent occurrences of high measured values for underwater irradiance raised concerns about the persistence of Fraunhofer lines. The effect of an increased light ... |
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| The Efficient Calculation and Display of Dispersion Curves for a Thin Cylindrical Shell Immersed in a Fluid |
SEP 1992 |
5 pages |
| Authors:
Harry A. Schenck; NAVAL COMMAND CONTROL AND OCEAN SURVEILLANCE CENTER RDT AND E DIV SAN DIEGO CA
|
| Much of the extensive literature on shell theory centers around the computation of on curves, usually thought of as the roots of a determinant D which relates the angular frequency w to the wave numbers for free waves traveling on the shell. For a cylindrical shell, the free wave paths are actually helical curves on the surface of the shell, having both a circumferential and an axial wave number. In ... |
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| Software is a Product...Not |
SEP 1992 |
3 pages |
| Authors:
M. D. Shapiro; NAVAL COMMAND CONTROL AND OCEAN SURVEILLANCE CENTER RDT AND E DIV SAN DIEGO CA
|
| Much of our planning for software uses the hardware product model. While we're not perfect, we do a fairly good job of managing hardware engineering for required time, quality, and money. But software more often than not is late, doesn't do what we want it to do, and costs too much. And that's a problem. We can't see a solution to our problem-perhaps because we have made the solution invisible ... |
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| Active Control of Complex Physical Systems: An Overview |
SEP 1992 |
11 pages |
| Authors:
E. W. Hendricks; R. J. Hansen; NAVAL COMMAND CONTROL AND OCEAN SURVEILLANCE CENTER RDT AND E DIV SAN DIEGO CA
|
| Active control of complex imposes unique requirements for physical models and feedback control strategies. Physical models which are adequate to predict the influence of actuators must be coupled with feedback control approaches suitable for use when system characteristics are incompletely specified a priori and change with time. The present paper describe laboratory scale experiments in which turbomachinery surge and stall and combustion instabilities are successfully attenuated by active means. Work ... |
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| Target Detection, Shape Discrimination, and Signal Characteristics of an Echolocationg False Killer Whale (Pseudorca crassidens) |
SEP 1992 |
11 pages |
| Authors:
R. L. Brill; J. L. Pawloski; D. A. Helweg; W. W. Au; P. W. Moore; NAVAL COMMAND CONTROL AND OCEAN SURVEILLANCE CENTER RDT AND E DIV SAN DIEGO CA
|
| This study demonstrated the ability of a false killer whale (Pseudorca crassidens) to discriminate between two targets and investigated the parameters of the whale's emitted signals for changes related to test conditions. Target detection performance comparable to the bottlenose dolphin's (Tursiops truncatus) has previously been reported for echolocating false killer whales. No other echolocation capabilities have been reported. A false killer whale, naive to conditioned echolocation tasks, was initially trained ... |
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| An International Perspective on ROV Technology |
SEP 1992 |
8 pages |
| Authors:
Robert L. Wernli; NAVAL COMMAND CONTROL AND OCEAN SURVEILLANCE CENTER RDT AND E DIV SAN DIEGO CA
|
| The ROV'92 Conference and Exposition, the 10th in a series of successful high technology events, was held on 9-12 June 1992 in San Diego, California, USA. The conferences, sponsored by the Remotely Operated Vehicle Committee of the Marine Technology Society has been held in San Diego in 1983, 1984, 1985, 1989, and 1992. Other locations included Aberdeen, Scotland (1986), Bergen, Norway (1988), Vancouver, British Columbia, Canada (1990), and Hollywood, Florida, ... |
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| Comparison of Sonar Discrimination by an Echolocating Dolphin and a Counterpropagation Neural Network |
SEP 1992 |
6 pages |
| Authors:
NAVAL COMMAND CONTROL AND OCEAN SURVEILLANCE CENTER RDT AND E DIV SAN DIEGO CA
|
| The capability of an Atlantic bottlenose dolphin to discriminate wall thickness differences of hollow cylinders by echolocation was studied by Au and Pawloski (1992). A standard cylinder of 6.35 cm wall thickness was compared with cylinder shaving wall thickness that differed from the standard + or - 0.2, + or - 0.3, + or - 0.4, and + or - 0.8 mm. All cylinders had an O.D. of 37.85 mm, ... |
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| Hybrid Microcircuit Assembly Manufacturing Process Parameters Data List |
AUG 92 |
|
| Authors:
NAVAL COMMAND CONTROL AND OCEAN SURVEILLANCE CENTER RDT AND E DIV SAN DIEGO CA
|
 | The Hybrid Microcircuit Assembly manufacturing process parameters have been established in order to bring about their recognition and control. The list is of generic thin film, thick film and multi-chip modules constructed with multi-layer green tape alumina and substrates. The list starts with substrate fabrication and progressing through to final assembly, inspection, and test. Once the parameters have been fully recognized and completely described, progress can be made in regulating ... |
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| Effects of CW- and BPSK-Signal Interference on a Standard BPSK Digital Communications System |
AUG 92 |
52 pages |
| Authors:
R. A. Axford; NAVAL COMMAND CONTROL AND OCEAN SURVEILLANCE CENTER RDT AND E DIV SAN DIEGO CA
|
| In this report, the effects of two forms of interference on the error rate of a standard binary phase shift keyed (BPSK) digital communications system are examined. Specifically, the impacts of Continuous Wave- CW) carrier and other BPSK-signal interferers on the probability of bit error in the matched- filter receiver of the standard BPSK communications system are calculated as functions of interferer-to-signal carrier power ratios, frequency offsets, phase offsets, and ... |
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| Interface Control Drawing for JTIDS DDG-69 Shipboard Antenna. Revision A |
AUG 92 |
20 pages |
| Authors:
S-y. Shih; R. Cozad; NAVAL COMMAND CONTROL AND OCEAN SURVEILLANCE CENTER RDT AND E DIV SAN DIEGO CA
|
| The Interface Control Drawing (ICD) detailed in this document establishes the mechanical and electrical interface requirements and procedures necessary to install and integrate the Full-Scale Development (FSD) Joint Tactical Information Distribution System (JTIDS) shipboard antenna on a DDG-69 class platform. JTIDS, transmit antenna, receive antenna. |
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| Environment/Tool Integrator for Software Development. Version 1.1 |
AUG 92 |
36 pages |
| Authors:
N. T. Tran; R. H. Mumm; NAVAL COMMAND CONTROL AND OCEAN SURVEILLANCE CENTER RDT AND E DIV SAN DIEGO CA
|
| This report describes the environment/tool integrator (ETI) that was developed under the Software Engineering Environment Prototypes (SWEEP) task of the Software Engineering for Command Control and Communications (C3) Systems project. The ETI is a windowing framework for accessing the diverse collections of software tools used by software development projects. It can easily be customized to satisfy the unique needs of specific projects. C, Ada, Graphical user interface builder, Motif, X, ... |
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| Optimum Design of Multiwire Cages for High-Voltage Applications |
AUG 92 |
73 pages |
| Authors:
P. M. Hansen; NAVAL COMMAND CONTROL AND OCEAN SURVEILLANCE CENTER RDT AND E DIV SAN DIEGO CA
|
| This report examines the parameters for systems of multiwire cages carrying high voltages above ground in order to minimize the maximum electric field on the surface of the wires. For the two-wire case, the following methods of calculation were compared (1) a simple geometric theory (SGT); (2) a complete geometric theory (CGT); (3) an infinite series of images ( exact solution for given constraints); and (4) a computer-based method of ... |
|
| Simultaneous Disordering and Isolation Induced by Ion Mixing in InGaAs/ InP Superlattice Structures |
AUG 1992 |
8 pages |
| Authors:
S. A. Pappert; W. Xia; B. Zhu; A. R. Clawson; Z. F. Guan; NAVAL COMMAND CONTROL AND OCEAN SURVEILLANCE CENTER RDT AND E DIV SAN DIEGO CA
|
| The phenomenon of simultaneous compositional disordering and the formation of electrical resistive layers induced by oxygen implantation in InGaAs/InP superlattices has been investigated. The disordering characteristics have been studied as a function of implantation temperature and ion dose. It was found that implantation at elevated temperatures (referred to as the IM or ion mixing process) usually leads to much more efficient disordering compared to implantation at room temperature followed by ... |
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| Operations Support System (OSS) Integrated Database (IDB) Design and Development: Software Reuse Lessons Learned |
AUG 1992 |
10 pages |
| Authors:
Marion G. Ceruti; Sharon D. Rotter; Kristofer Timmerman; Jennifer Ross; NAVAL COMMAND CONTROL AND OCEAN SURVEILLANCE CENTER RDT AND E DIV SAN DIEGO CA
|
| Lessons learned are presented concerning the reuse of information management systems components in the design development and support of the Operations Support System (OSS) Integrated Database (IDB). These components were developed originally under a wide variety of C4I programs of Navy, Air Force and Joint Command Centers. Reuse of components was possible because known standards such as the C programming language, Structured Query Language (SQL) and the Naval Warfare Tactical ... |
|
| Oscillatory Injection of Gaseous Fuel into a Ducted Air Stream |
AUG 1992 |
6 pages |
| Authors:
F. Wen-Li; E. Hendricks; S. Sivasegaram; J. Whitelaw; NAVAL COMMAND CONTROL AND OCEAN SURVEILLANCE CENTER RDT AND E DIV SAN DIEGO CA
|
| Oscillation of fuel composition in ducted air flows with oscillatory injection of gaseous fuel was studied using temperature difference as scalar in flows involving radial injection of an oscillatory fuel jet and radial and axial injection of a steady air-fuel jet with oscillatory fuel composition into a ducted air stream. Local measurements of mean and oscillatory velocity and scalar in turbulent flow were carried out with flow rates, frequency and ... |
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| Mechanical Properties of Centrifugally Cast Metal Matrix Composites |
JUL 92 |
24 pages |
| Authors:
J. D. Maltby; NAVAL COMMAND CONTROL AND OCEAN SURVEILLANCE CENTER RDT AND E DIV SAN DIEGO CA
|
| The objective of this report was to determine the tensile and compressive mechanical properties for two metal matrix composite (MMC) aluminum cylinders manufactured by Westinghouse STC, Advanced Materials Department, through use of a centrifugal casting process. tensile mechanical properties, compressive mechanical properties, MMC aluminum cylinder. |
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| Visualization of Scattering Strength of Elastic Bodies in a Fluid |
JUL 92 |
72 pages |
| Authors:
H. A. Schenck; J. L. Fales; NAVAL COMMAND CONTROL AND OCEAN SURVEILLANCE CENTER RDT AND E DIV SAN DIEGO CA
|
| As Part of the Submarine Technology Program, the Defense Advanced Research Projects Agency (DARPA) recently sponsored a Low-Frequency Structural Acoustics Benchmark Exercise. The purpose of the exercise was to test and validate several major computational codes that have been developed to solve acoustic scattering problems of elastic objects in a fluid. This report describes some of the visualization techniques and procedures that were developed to review, compare, and analyze the ... |
|
| A New Matrix Formulation of Classical Electrodynamics. Part 2. Wave Propagation in Optical Materials of Infinite Extent |
JUL 92 |
42 pages |
| Authors:
R. P. Bocker; NAVAL COMMAND CONTROL AND OCEAN SURVEILLANCE CENTER RDT AND E DIV SAN DIEGO CA
|
| Presented in this document is the development of a new matrix description of electromagnetic wave propagation in optical media of infinite extent. This material will interest individuals desiring a description of electromagnetic wave propagation that deviates from the traditional vector calculus approach. Our starting point will be with the fundamental equations of classical electrodynamics, namely the Maxwell field equations. From the vector form of Maxwell's equations, and 8-by-8 differential matrix ... |
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| The Next Generation Computer Resources (NGCR) Database Management System Standards Working Group (DBWG) Update |
JUL 92 |
12 pages |
| Authors:
D. Fisher; NAVAL COMMAND CONTROL AND OCEAN SURVEILLANCE CENTER RDT AND E DIV SAN DIEGO CA
|
| The Navy's traditional standard embedded computer approach is no longer competitive in the present and emerging computing resources environment. Rapidly changing commercially based technologies permit more efficient and effective solutions to the full range of Navy computing resource requirements. Computing resources include the totality of computer equipment, computer programs, computer data, associated documentation, personnel, services and support. The objective of the NGCR program is to provide a new basis and ... |
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| Shipboard Readiness Report System (SRRS) Software Prototype |
JUL 92 |
60 pages |
| Authors:
Maniel Vineberg; Stan Connors; Tony Sterrett; Dave Shore; NAVAL COMMAND CONTROL AND OCEAN SURVEILLANCE CENTER RDT AND E DIV SAN DIEGO CA
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| This document describes a software prototype of a Shipboard Readiness Reporting System (SRRS) (reference 1). SRRS will provide useful, accurate, concise, and timely readiness status reports to users who operate and maintain shipboard systems. SRRS is designed in the context of a layered open architecture, anticipating future shipboard architectures. The highest layer of the architecture includes both operational functions (relating directly to the ship's mission) and readiness reporting functions. SRRS ... |
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| Remote Multi-Octave Electromagnetic Field Measurements Using Analog Fiber Optic Links |
JUL 1992 |
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| Authors:
S. A. Pappert; M. H. Berry; S. M. Hart; R. J. Orazi; S. T. Li; NAVAL COMMAND CONTROL AND OCEAN SURVEILLANCE CENTER RDT AND E DIV SAN DIEGO CA
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| Broadband electromagnetic field detection and monitoring systems have been investigated in the 30 MHz - 18 GHz frequency range. To minimize the intrusivness of these field monitoring probes, fiber optic and electro-optic techniques have been employed to transmit the detected broadband information to a remote processing station. These short-haul (< 1 km) wideband fiber optic links possess no electrical or optical amplifiers to boost the detected antenna signal which increases ... |
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| Attitude Error Estimation with a General Observation Matrix |
JUL 1992 |
11 pages |
| Authors:
Charles A. Bass; Constantine Karmokolias; Azaad Khatri; NAVAL COMMAND CONTROL AND OCEAN SURVEILLANCE CENTER RDT AND E DIV SAN DIEGO CA
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| Conventional integrated GPS/INS navigation systems model pseudo range (PR) and delta range (DR) residuals as functions of position, velocity, user clock bias and user clock drift errors. Any dependence of PR and DR residuals to attitude errors, due to differences between the navigation solution reference point and the antenna phase center, is ignored. Attitude errors are estimated through correlation to, primarily, velocity errors. This correlation develops due to the coupling ... |
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